Device for transmitting power



July. 12 1927. ,635,585

J. R. ROGERS DEVICE FOR TRANSMITTING POWER Filed Oct. 1920 5Sheets-Sheet 1 I I I I.

July 12 1927. J. R RGGERS DEVICE FOR-TRANSMITTING POWER 3 3 Sheets-Sheet2 Filed 0 July 12, 1927.

Fig.5.

I J. R. ROGERS DEVICE FORTRANSMITTING POWER Filed Oct. 50- 1920 sSheets-Sheet 5 a relation between Patented July 12, 1 9 7. i

- UNITED. sra'rs Joann. noenns, or BROOKLYN, NEW YORK.

nnvrcr. m TRANSMITTING rowan.

Application filed October 30, 1920. Serial No. 420,668.

The devices hereinafter described may be considered as improvements uponmy application, Serial Number 402,032 filed Aug. 20, 1.920 and PatentNo. 1,256,596 granted to me on the 19 day of February, 1918.

The object ofthe device istocontrol the speed of a driven shaft by theresistance encountered by said shaft, and establish such the driving andthe driven shafts that as the resistance increases on the driven shaft,at a certain point, it will revolve at a lower speed, but with greatertorque, while the driving shaft revolves at constant speed with anygiven ower. I

i In the followingl have described, in con nection with the accompanyingdrawings, one form of device illustrating the applica tion of myinvention to means for controlling the speed ofan automobile.

Referring to thedrawings, Figure 1 is a perspective view of the deviceas applied. to an automobile, looking from the front of the inarhine,the cover being removed and :parts being broken away. a e

Figure 2 is a view, similar to 1, showing inedotted lines a formlofconstruction as actuallymade andused, parts being broken away I q Figure3 is a view, on a smaller scale than Fig. 1, of the parts shown inFigure 1,re-

moved from the casing and omitting cer-' tain lines for the sakeofclearness, parts being broken away.

Figure t is a view, on the scale of Fig. 3, of the rear portion oftheedevice shown on Figure 1, the rear cover being removed.

ure 1 on the lines 5 shown in full lines.

Similar letters of reference indicate simi- ,lar parts throughout theseveral vie'ws.

Referring to Figures 1 and 2, A is a drum or casing, the front wall orcover of which 5, the shafts being has been removed.

B is a plate loosely mounted on the driving shaft S, in anysuitable'manner, such as is hereinafter described. Fast to the plate 13are two blocks HnH. Between the blocks I-LH are two rods G..G, mountedat either end in the blocks H..H. Surround- I ing the rods G..G

On the driving shaft S and secured to it i This eccentric revolvesinside of a casing D. r Pivot-ally mounted on by suitable bolts is aspur-gear L.

Figure 5 is a vertical section through Figare two powerful springsdifferent action takes place.

the casing D are two arms E..E, pivotally certain conditions hereinafterdescribed, are

alternately compressed and allowed to expand again. The action of thiseccentric C through the springs tends to cause the plate 13 torevolveclockwise.

Securely fastened to the back.

The spurgear L is loosely mounted upon an cecentric C secured to drivingshaft S.

of plate B Dar ing the revolution of the eccentric C, the

spur-gear L is in mesh constantly with an internal gear K. a e

The internal gear K is securely fastened to the drum or casing A and ismounted concentric with shafts S and S, the drum A being splined orotherwise fastened. to

the driven shaft S.

The eccentrics C and C have upon their surfaces suitable ball-bearingsto avoid friction.

In Figure 4, K is the internal gear and L the spur-gear mounted,eccentrically to the driving shaft S.

Figure 5 shows the driving shaft S, the driven shaft S, the plate Bhaving secured to it the spur-gear L, and the drum or casing A, carryingthe internal gear K, said drum or casing being secured tothe drivenshaft S, as above described.

In the operation of the device, the driving shaft S is assumed to berevolved by the engine clockwise. This carries around the eccentric Owhich tends to compress the springs I and to revolve the wholemechanisinclockwise. So long as the springs I do not compress, the teethin the gear L will remain in contact with the corresponding no gearaction between them. At this time the driving shaft S is driving thedriven shaft S at the same speed with which it "itself revolves. At thistime the whole mechanism is revolving integrally, or as a unit at thespeed of the engine.

, When, however, the resistance on the driven shaft S becomes so greatas to cause the springs I to compress and expand, a The eccentric lUtiIll)

G in its revolution now compels the spurgear L to move around the shaftS eccentrically, thereby driving the internal gear K forward by anamount equal to the dif- 5 ference between the number of teeth in thegear L and the number of teeth in gear K, thereby obtaining an increasedamount of tortpie in proportion to the difference in the number of teethbetween the spur-gear L l and the internal gear K.

ii hcn the resistance on the driven shaft S becomes so greatthat theplate B stands still with reference to the gear K, the gear K isrevolved forward one revolution for i the number of its teeth divided bythe difference between the teeth of the gears L and ii. in the machineconstructed, the gear L has ll teeth and the gear K has 51 teeth, makinga dili'erence of 7 teeth. Eccentric C, therefore, makes seven andtwo-sevenths of a revolution for one revolution of the gear K under thecircumstances above mentioned.

Experience has shown that between the in- 'al revolution of the wholemechanism as described, and the point at which the )l; 'e B stands stillwith reference to the gear ii, there are an infinite number ofintermediate speeds, that is to say, the springs 39 l are tending torevolve the whole mechanism an integer, while their compression andexpansion allows the eccentric C to operate through the gear L with anincreased toi on the gear K which is fast on the d en shaft 5. The speedof the driven aft S is the result of the sum of the forces exertedthrough the springs, and by the eccentrics and is governed exactly bythe re- 'istance on the driven shaft S.

The applicant is well aware that the action of an eccentric, such as Cthrough a gear. such as L, upon an internal gear, such as K, not new,but in every case known to the applicant the gear L is attached in sownto a tired point outside of the mechanism. This is usually done by anarm or lever attached to the gear L, and having a slot in it, in which apin works, which pin is attached rigidly to something outside of themechanism.

Tv hen such pin and arm is used, the eccentric C is always working andthe driven gear K always revolved at a lower speed than the eccentric,such speed being directly proportional to the difference between thenumber of" teeth in the gear L and the gear K, as above described.

The difference between the action last mentioned and the action ofapplicants device, is primarily due to the fact that the reaction of agear, such as gear L, upon a gear, such as gear K, in the old device, ispartly against a fixed pin outside of the mechanism in connection with aslotted lever fast to the gear L, while in applicants device, thereaction of the gear L when it is acting on gear K, is against thesprings LI and through linked arms E.E., against the driving shaft-S.

The reaction in applicants device allows the whole device to revolveintegrally when the resistance on driven shaft S is less than theresistance of springs II, but when the resistance on driven shaft S isgreater than the resistance of the springs LL, then the springs compressand expand and both actions, that is, action through the eccentrics andthrough the springs Ll. takes place at the same time.

In the old device the action of the gear, such as gear L, upon the gear,such as gear ii, is constantly reacting against the fixed pin and thereis always a constant ditl'erence between the speed. of the gears andhence between the driving and driven shafts.

The applicant believes that he is the first to eliminate the tired pinand lever or its cipiivalei'it and allow the reaction of the gear L tocome against a yielding connection attached to the driving shaft S andtending to revolve with it.

By the use of this mechanism the power of the eccentrics C and C can beapplied through the springs alone, or through the gears reacting againstthe springs, or through both gears and eccentrics at the same time.

Eizperience has shown that even when the resistance of the driven shaftS is so great that the plate B backward slowly, the same action abovedescribed continues.

l lxperienre has also shown that the tension of the springs I shouldpreferably be about four-fifths of the total torque exerted on thedriving shaft S. In the car used for experimenting, the torque developedby the e ine is about 1500 inch-pounds. The 'ngs were, therefore,designed to give a resistance of about 1200 inch-pounds.

There are many advantages which will be obvious in the use of thismechanism. The gears are constai'itly in mesh and do not have to bechanged in order to get an increase in torque.

The ordinary clutch is not necessary and in some cases, at least, anordinary dog clutch all that is required. Under any ordinarycircumstances with full throttle, the engine cannot be stalled. Instarting or in going up a steep incline, the springs work, and the speedis proportionate to the resistance applied to the rear wheels.

Any suitable device may be used for connecting the gears K and L so thatthe entire torque of the engine may be used on av level road. Thisdevice can be worked by either hand or foot.

While I. have shown this mechanism as applied to an automobile, I do notlimit myself to such use, as I believe that in many self to springsonly, as it is obvious that lit) other equivalent yielding means, suchas a piston and cylinder forinstance, could be used. I however prefer touse springs.

WVhere the word differential is used in the claims it is used in thebroad sense and not in the narrow sense as colloquially applied to thegear on the rear axle of an automobile.

Having described my invention and what i I claim is:

1. In a mechanism for transmitting power, a driving shaft, a. drivenshaft, an eccentrio on said driving shaft, a gyratory gear freelymounted on said eccentric, a gear secured to the driven shaft andmeshing with said gyratory gear and yieldable means operativelyconnecting said gyratory gear with said driving shaft. I

2. In a mechanism for transmitting power, a driving shaft, a drivenshaft, an eccentric on said driving shaft,a gyratory gear freely mountedon said eccentric, a gear secured to the driven shaft and meshing withsaid gyratory gear and a spring carried by the gyratory gear and meanscooperating therewith connected with the driving shaft.

3. In a mechanism for transmitting power, a driving shaft, a drivenshaft, an eccentric on said driving shaft, a gyratory gear freelymounted on saideccentric, an internal gear secured to the driven shaftand meshing with said gyratory gear, a second eccentric mounted on thedriving shaft and yieldable means operatively connecting said gyratorygear with said driving shaft through said second eccentric whereby thegyratory gear is adapted to react entirely against the driving shaft andyieldingly restrained movement is independently permitted between thegymtory gear andthe driven shaft.

4-. Ina mechanism for transmitting power,

. a driving shaft, a driven shaft, an eccentric on sa d driving shaft, agyratory gear freely mounted on said eccentric, an internal gear securedto the driven shaft and meshing with said gyratory gear, a'secondeccentric mounted on the driving shaft and spring controlled meansoperatively connecting said gyratory gear with said driving shaftthrough said second eccentric, whereby the gyratory gear is adapted toreact entirely against the driving shaft and'yieldingly restrainedindependent movement is permitted between the gyratory gear and thedriven shaft.

5. In a mechanism for transmitting power, adriving shaft, a drivenshaft, aninternal driven gear fast on the driven shaft, an eccentricfast on the driving shaft, a driving gear revolvabl mounted on saideccentric meshing with the internal driven gear, a second eccentric faston the driving shaft and a yielding connection between said secondeccentric 'and said driving gear whereby yieldingly restrainedindependent movement is permitted between the driving gear and thedriven shaft.

6. In a mechanism for transmitting power, a driving shaft, a drivenshaft, a gear fast on the driven shaft, an eccentric fast on the drivingshaft, a driving gear loosely mounted on said eccentric meshing with thegear on the driven shaft, a plate fast to said driving gear, a secondeccentric fast on the driving shaft and a yielding connection betweensaid second eccentric and said plate whereby yieldingly restrainedindependentmovement is permitted between the driving gear and the drivenshaft.

7. In a mechanism for transmitting power, a driving shaft, a drivenshaft, a gear fast on the driven shaft, an eccentric fast on the drivingshaft, a driving gear loosely mounted on said eccentric and meshing withthe gear on the driven shaft, a plate fast to said driving gear, asecond eccentric fast on the driving shaft, springs mounted on saidplate and means controlled by said second eccentric through said springswhereby yiedingly restrained independent movement is permitted betweenthe driving gear and the driven shaft.

S. In a mechanism for transmitting power, a driving shaft, a drivenshaft, an internal gear fast on the driven shaft, an eccentric fast onthe driving shaft, a driving gear loosely mounted on'said eccentric andmesh ing with the internal gear, a plate fast to the driving gear, asecond eccentric fast on the driving shaft, springs mounted on saidplate, a casing fast on said second eccentric, arms pivotally connectedat one end to said casing, and sleeves adjacent said springs to whichthe other ends of said arms are pivotally connected, whereby yieldinglyrestrained independent movement is permitted between the driving gearand the driven shaft.

In testimony whereof I have signed this specification.

JOHN R. noenns.

